Citazione APA

Ehlers,ernest g, & Blatt,harvey. (1982). Petrology: Igneous,sedimentary,and metamorphic. CBS.

Stile di citazione Chicago

Ehlers,ernest g, e Blatt,harvey. Petrology: Igneous,sedimentary,and Metamorphic. new delhi: CBS, 1982.

Citazione MLA

Ehlers,ernest g, e Blatt,harvey. Petrology: Igneous,sedimentary,and Metamorphic. CBS, 1982.